30 Functions and Parameters of the Vivo 40
Vivo 40 clinician’s manual
Doc. 003886 En-Us A-1e
4.4 The PCV Mode (Pressure Control Ventilation)
In the PCV mode, the ventilation is controlled by the Vivo 40. This is done by
the pressure, rate, inspiration time, and rise time settings.
Inspiration is started either when the ventilator initiates a breath, or when the
patient triggers a breath (if the trigger function is activated). The ventilator tries
to reach and maintain the set pressure until the expiration starts.
The inspiration stops and an exhalation starts in two cases:
• The inspiration time expires.
• The limit for the high-pressure alarm is reached.
The figure below shows how the pressure and the inspiration time settings con-
trol the ventilator’s function in the PCV mode.
The following settings have been used: Pressure 20 cmH
2
O, insp. time 1.8 sec.
Pressure
cmH
2
O
Pressure setting
Patient exhales
seconds
seconds
Insp. time PCV
Start of
breath
Patient flow
Max flow and set pressure is reached
Patient exhales
IPAP
EPAP
